Montagu, Ashley, 1905-1999
Word Publishing, 1995
Buku Teks
Woodward, Val
Burgess, 1981
Buku Teks
Cummings, Michael R.
Brooks/Cole, Cengage Learning, 2011
Buku Teks
Snyder, Laurence H.
Heath, 1957
Buku Teks
Wiener, Alexander S.
Grune and Stratton, 1958
Buku Teks